SU1606791A1 - Device for closing water supply - Google Patents

Abstract

The invention relates to water supply systems for passenger cars and allows shutting off the water supply to the tank after it has been filled. The purpose of the invention is to ensure the stability of operation when the input pressure changes. For this, the damper chamber / DK / 14 is made in the form of a cylinder 15 with a beveled end 16 and is located in the inlet chamber 2. The disk 17 is rigidly fixed on the rod 11. The pressure created in DK 14 when the tank 6 is filled with water is directly proportional to the water flow pressure . 2 Il.

Description

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The invention relates to the maintenance of railway rolling stock and can be used to automatically shut off the water supply when refueling a passenger car.

The purpose of the invention is to ensure the stability of operation when the input pressure changes.

FIG. 1 shows a device for shutting off the water supply; in fig. 2 is a section A-A in FIG. one,

The device comprises a housing 1 divided into an inlet chamber 2, an outlet chamber 3 and a float chamber 4. An inlet 5 is connected to the inlet chamber 2, and an outlet chamber 3 is connected to the water tank 6 via the outlet 7. The water tank 6 communicates with the float chamber 4 using a connecting pipe 8. In the inlet chamber 2 there are installed a check valve 9 with a seat 10 and a stem 11 interacting with the pollavk 12 with a clamp 13, and a damper chamber 14 made in the form of a cylinder 15 with a flat end 16, located on the side input th nozzle 5. The disc 17 is rigidly fixed on the rod 11. Between the disc 17 and the cylinder 15 formed by gap 18.

The plane of the disk 17 should be parallel to the axis 19 of the inlet nozzle 5. When the axis 19 of the inlet nozzle 5 is at a negative angle, the valve instantly activates, and at a positive angle additional pressure is applied from above to the disk to prevent the valve from closing.

The device works as follows.

Water is supplied through the inlet 5 to the inlet chamber 2 and at the same time filled. no damper; chamber 14. Then from the inlet chamber 2 water flows into the outlet chamber 3 and through the outlet nozzle 7 into the water tank 6.

As the water level in the tank 6 increases, and the water level in the float chamber 4 increases. Since the check valve 9 with the valve stem 11 is in the water flow, water tends to push the valve stem 11. The greater the pressure in the pressure line, the greater the force the flow, the earlier the shut-off valve 9 tends to close and stop the flow of water before reaching the established

the level of water in the tank 6. The presence of a disk 17 located in the flow of water movement, and a cylinder 15 with a beveled end 16 creates additional resistance, so

as the pressure in the damper chamber 14 above the disk 17 is higher than the pressure below it, since the speed of water movement under the disk 17 is greater than above it. The speed of movement of water above the disk 17 depends on

the gap 18 between the disk 17 and the cylinder 15. The pressure in the damping chamber 14 is directly proportional to the pressure in the pressure line. Therefore, only when the established level is reached does the float 12

it is raised and with the help of the clamp 13 raises the rod 11. With a reduction in the flow area between the check valve 9 and the seat. 10 (when it becomes less than the inlet section through passage)

Different pressures occur in the valve valve and valve valve regions. The resulting pressure in the subvalvular region tends to press the check valve 9 against the seat 10. Disk 17, moving in the damper

chamber 14, inhibits the movement of the rod 11 and eliminates the hydraulic shock at the time of closing the check valve 9.

The disk 17 together with the cylinder 15 performs two functions: stabilize the operation of the device in terms of the water level in the tank, regardless of the pressure in the pressure line, and eliminate hydraulic shock at the moment the shut-off valve is closed.

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Claims (1)

Invention Formula A device for shutting off the water supply, comprising a housing divided into inlet, outlet and float chambers, provided respectively with inlet, outlet and connecting pipes, a shut-off valve with a stem installed with the possibility of vertical movement relative to the float located in the float chamber, a damper chamber with a disk mounted on the stem, characterized in that in order to ensure stability of operation when the input pressure changes The damper chamber is installed in the inlet chamber and is made in the form of a cylinder with a beveled end located on the side of the inlet nozzle, the axis of which is parallel to the orientation The plane of the disk is fixed, and the mused disk is rigidly fixed on the rod. FIG. 2